Answer: alternative D.
Explanation: Dr. DeVries should choose his sample population randomly in order for his research to be representative, even having a specific population, which is high school seniors, that he wants to study. By <u>choosing specifically students from an exclusive college preparatory school, he isn't considering how students from other schools might perform in his research test</u>. This would be a very important step for him to understand how the practice in problem solving affects the ability related to it. Otherwise, he will have a distorted result.
Answer:
National labor relations act 1935
Explanation:
National Labor Relations Act ("NLRA") is a foundational statute of United State labor law in 1935 to protect the rights of employees and employers, to encourage collective bargaining, and to curtail certain private sector labor and management practices, which can harm the general welfare of workers, businesses and the U.S. economy.
Idn't Spain have more colonies in Africa?
OK. During the era of exploration, the Portuguese were sailing around the coast of Africa and began their colonies in Mozambique, Angola, Guinea-Bissau, Cape Verde and Sao Tome y Principe. By the 1500's, Spain was preoccupied by explanding their empire in the Americas. Africa was then ignored for centuries before the introduction of quamine, which allowed Europeans to travel inland in Africa without dropping like flies from malaria. Hence, in the 1870's the scramble for Africa began! The British and French, the two largest Western powers of the day, took the most land in Africa. Germany too took colonies...Cameroon, Tanzania, Togo and Namibia were German colonies before WWI. Even Belgium took the Congo (they actually began the Scramble for Africa after circumnaviagting the Congo River). After WWI, they would also take Rwanda and Burundi from the Germans.
